path: root/arch/powerpc/include
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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-11-15 17:29:08 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-11-25 14:53:15 +1100
commit184cd4a3b962a4769889615430eaf40076b97969 (patch)
treedc1df367a9a3e5b641f480a2e9a729a337762492 /arch/powerpc/include
parentca45cfe31ee5b59eb2e0f19baac575a4f5b68537 (diff)
powerpc/powernv: PCI support for p7IOC under OPAL v2
This adds support for p7IOC (and possibly other IODA v1 IO Hubs) using OPAL v2 interfaces. We completely take over resource assignment and assign them using an algorithm that hands out device BARs in a way that makes them fit in individual segments of the M32 window of the bridge, which enables us to assign individual PEs to devices and functions. The current implementation gives out a PE per functions on PCIe, and a PE for the entire bridge for PCIe to PCI-X bridges. This can be adjusted / fine tuned later. We also setup DMA resources (32-bit only for now) and MSIs (both 32-bit and 64-bit MSI are supported). The DMA allocation tries to divide the available 256M segments of the 32-bit DMA address space "fairly" among PEs. This is done using a "weight" heuristic which assigns less value to things like OHCI USB controllers than, for example SCSI RAID controllers. This algorithm will probably want some fine tuning for specific devices or device types. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h
index 56b879ab3a4..882b6aa6c85 100644
--- a/arch/powerpc/include/asm/pci-bridge.h
+++ b/arch/powerpc/include/asm/pci-bridge.h
@@ -153,8 +153,8 @@ struct pci_dn {
int pci_ext_config_space; /* for pci devices */
-#ifdef CONFIG_EEH
struct pci_dev *pcidev; /* back-pointer to the pci device */
+#ifdef CONFIG_EEH
int class_code; /* pci device class */
int eeh_mode; /* See eeh.h for possible EEH_MODEs */
int eeh_config_addr;
@@ -164,6 +164,10 @@ struct pci_dn {
int eeh_false_positives; /* # times this device reported #ff's */
u32 config_space[16]; /* saved PCI config space */
+#define IODA_INVALID_PE (-1)
+ int pe_number;
/* Get the pointer to a device_node's pci_dn */